Biomass fuel raw material drying device

Abstract

The biomass fuel raw material drying device comprises a supporting frame and a feeding structure arranged on the supporting frame, the feeding structure comprises a feeding barrel arranged on the supporting frame, the upper half portion of the feeding barrel is provided with an opening and a breathable screen frame, the bottom of the feeding barrel is provided with a discharging port and a heating piece, the breathable screen frame is provided with a feeding port, a feeding auger is arranged in the feeding barrel, and the feeding auger is arranged on the supporting frame. The end of the feeding auger is connected with the output end of a motor, the motor is connected with the feeding barrel through a first fixing base, and an auxiliary drying structure is arranged at the bottom of the feeding barrel. By the adoption of the structure, dynamic drying is achieved, fixed-point heat source radiation is matched with feeding, materials are continuously rolled and conveyed, heating is more uniform, water evaporation is fast, and energy consumption is low; the drying cavity is simple and practical in structure, convenient to open, close and clean and easy to operate; and hot air is matched, air is continuously driven to flow in the drying process, damp and hot air is prevented from continuously circulating in the cavity and being rapidly discharged, and secondary moisture absorption is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of biomass fuel production and processing equipment, and in particular to a biomass fuel raw material drying device. Background Technology

[0002] Biomass fuels are generally made from agricultural and forestry waste (such as straw, sawdust, wood chips, rice husks, bagasse, rice bran, etc.), which is the main difference from fossil fuels. Direct combustion of biomass is a highly polluting fuel; it not only has low thermal efficiency but also pollutes the environment more easily. However, biomass fuels, after being processed through crushing, mixing, extrusion, and drying to form various shapes (such as blocks, pellets, etc.), are a new type of clean fuel.

[0003] However, biomass fuel feedstocks often contain a significant amount of moisture. The thoroughness of dehydration and drying directly affects the combustion efficiency of biomass fuels. Incomplete combustion produces large amounts of smoke and dust, easily polluting the environment. Therefore, drying the feedstocks during processing is necessary to remove excess moisture. Existing biomass fuel drying devices generally suffer from drawbacks such as low thermal efficiency, inconvenient maintenance, and poor moisture removal. These not only affect processing quality but also fail to improve processing efficiency, exhibiting numerous disadvantages. Therefore, we propose a biomass fuel feedstock drying device. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a biomass fuel raw material drying device with dynamic drying, which combines fixed-point heat source radiation with feeding, and the material is continuously tumbled and conveyed, resulting in more uniform heating, fast moisture evaporation and low energy consumption; the drying chamber has a simple and practical structure, is easy to open, close and clean, and is easy to operate; with the help of hot air, the airflow is continuously driven during the drying process, which avoids the continuous circulation of hot and humid air in the chamber, and quickly discharges the air to avoid secondary moisture absorption.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a biomass fuel raw material drying device, including a support frame and a feeding structure set on it. The feeding structure includes a feeding cylinder set on the support frame. The upper half of the feeding cylinder is open and equipped with a ventilated mesh frame. The bottom of the feeding cylinder is equipped with a discharge port and a heating element. The ventilated mesh frame is equipped with a feed inlet. A feeding auger is provided inside the feeding cylinder. The end of the feeding auger is connected to the output end of a motor. The motor is connected to the feeding cylinder through a first fixed seat. An auxiliary drying structure is provided at the bottom of the feeding cylinder.

[0006] In a preferred embodiment, one side of the breathable mesh frame is connected to the feeding cylinder via multiple hinge structures, and the other side of the breathable mesh frame is provided with a handle structure.

[0007] In a preferred embodiment, the breathable mesh frame is provided with a magnetic strip on the side near the handle structure, and the feeding cylinder is provided with an adsorption strip that cooperates with the magnetic strip on the side near the handle structure.

[0008] In a preferred embodiment, the auxiliary drying structure includes a heat insulation cover located at the bottom of the feeding cylinder and completely covering the heating element. One end of the heat insulation cover is provided with an air inlet pipe, and the other end of the heat insulation cover is provided with a vent pipe. The vent pipe is provided with multiple sets of air supply pipes and an air pump structure that communicate with the inner cavity of the feeding cylinder. The air pump structure is connected to the feeding cylinder through a second fixed seat.

[0009] In a preferred embodiment, the horizontal height of the connection end between the air supply pipe and the feeding cylinder is lower than the horizontal height of the connection end between the air supply pipe and the feeding cylinder.

[0010] In a preferred embodiment, the connection end of the air supply pipe to the feeding cylinder is closer to the discharge port than the connection end to the vent pipe.

[0011] In a preferred embodiment, the feed inlet is a wide-mouth feed trough.

[0012] The biomass fuel drying device provided by this utility model, by adopting the above-described structure, has the following beneficial effects:

[0013] (1) Dynamic drying combines the radiation of a fixed heat source with feeding, and the material is continuously tumbled and conveyed, resulting in more uniform heating, faster moisture evaporation, and lower energy consumption.

[0014] (2) The drying chamber has a simple and practical structure, is easy to open and close for cleaning, and is easy to operate;

[0015] (3) Hot air is used in conjunction with the drying process to continuously drive the airflow, avoid the continuous circulation of hot and humid air in the cavity, and quickly discharge it to avoid secondary moisture absorption. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the feeding cylinder of this utility model.

[0020] Figure 4 This is a schematic diagram of the feeding cylinder structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the auxiliary drying structure of this utility model.

[0022] In the diagram: 1. Support frame; 2. Feeding cylinder; 3. Ventilation mesh frame; 4. Hinge structure; 5. Handle structure; 6. Feeding auger; 7. Motor; 8. First fixed seat; 9. Discharge port; 10. Inlet port; 11. Adsorption strip; 12. Magnetic strip; 13. Heating element; 14. Insulation cover; 15. Air inlet pipe; 16. Ventilation pipe; 17. Air supply pipe; 18. Air pump structure; 19. Second fixed seat. Detailed Implementation

[0023] Example 1:

[0024] like Figure 1-5 The biomass fuel feedstock drying device includes a support frame 1 and a feeding structure mounted on it. The feeding structure includes a feeding cylinder 2 mounted on the support frame 1. The upper half of the feeding cylinder 2 is open and equipped with a ventilated mesh frame 3. The bottom of the feeding cylinder 2 is equipped with a discharge port 9 and a heating element 13. The ventilated mesh frame 3 is equipped with a feed inlet 10. A feeding auger 6 is installed inside the feeding cylinder 2. The end of the feeding auger 6 is connected to the output end of a motor 7. The motor 7 is connected to the feeding cylinder 2 through a first fixed seat 8. An auxiliary drying structure is provided at the bottom of the feeding cylinder 2.

[0025] In a preferred embodiment, one side of the breathable mesh frame 3 is connected to the feeding cylinder 2 via multiple hinge structures 4, and the other side of the breathable mesh frame 3 is provided with a handle structure 5. This facilitates maintenance and cleaning of the inside of the feeding cylinder 2.

[0026] In a preferred embodiment, the breathable mesh frame 3 is provided with a magnetic strip 12 on the side near the handle structure 5, and the feeding cylinder 2 is provided with an adsorption strip 11 that cooperates with the magnetic strip 12 on the side near the handle structure 5. The magnetic cooperation makes operation more convenient.

[0027] In a preferred embodiment, the auxiliary drying structure includes a heat insulation cover 14 disposed at the bottom of the feeding cylinder 2 and completely covering the heating element 13. One end of the heat insulation cover 14 is provided with an air inlet pipe 15, and the other end is provided with a vent pipe 16. The vent pipe 16 is equipped with multiple sets of air supply pipes 17 communicating with the inner cavity of the feeding cylinder 2, and an air pump structure 18. The air pump structure 18 is connected to the feeding cylinder 2 via a second fixed seat 19. The preheating of the heating element 13, combined with the flow of hot air, not only drives moisture out to avoid secondary moisture absorption but also improves drying efficiency.

[0028] In a preferred embodiment, the horizontal height of the connection end between the air supply pipe 17 and the feeding cylinder 2 is lower than the horizontal height of its connection end with the vent pipe 16. The airflow is sprayed obliquely downwards, and after reflection, the hot and humid air rises rapidly and dissipates.

[0029] In a preferred embodiment, the connection point of the air supply pipe 17 to the feeding cylinder 2 is closer to the discharge port 9 than its connection point to the air vent pipe 16. The airflow is injected obliquely forward, guiding it to cover a longer material action path.

[0030] In a preferred embodiment, the feed inlet 10 is a wide-mouth feed chute. Wide-mouth feeding avoids material blockage.

[0031] Example 2:

[0032] like Figure 1-5 In the middle, the breathable mesh frame 3 is fastened to the feeding cylinder 2 by the hinge 4, and the magnetic strip 12 and the adsorption strip 11 automatically attract and seal.

[0033] Start motor 7 to drive feeding auger 6, and preheat heating element 13 to the set temperature.

[0034] Biomass raw materials are fed into the inlet 10, and the feeding auger 6 pushes the material to move towards the outlet 9.

[0035] The heat generated by the heating element 13 radiates heat to the material through the bottom of the feeding cylinder 2. At the same time, the air pump 18 injects hot air into the cylinder obliquely downward through the air supply pipe 17, and the moisture is discharged from the ventilated mesh frame 3.

[0036] The dried material is discharged from outlet 9;

[0037] Lift handle 5 to open the ventilation mesh frame 3 and clean the residue inside the cylinder.

[0038] Example 3:

[0039] like Figure 1-5 In the middle, when the feeding auger 6 rotates, it pushes the material towards the discharge port 9. During the conveying process, the material is turned over by the auger blades, increasing the contact area with the hot air.

[0040] The heating element 13 provides basic heating to the material through the bottom of the feeding cylinder 2, while the hot air stream is injected obliquely downward into the cylinder through the air supply pipe 17, forming a composite heating mode of bottom radiation combined with middle convection.

[0041] The hot airflow driven by the air pump 18 is injected into the lower part of the feeding cylinder 2 through the air supply pipe 17. The airflow is simultaneously sprayed obliquely downward along the inclined pipe and obliquely forward. It is quickly reflected and carries moisture upward through the breathable mesh frame 3 for discharge.

[0042] The design of the air supply pipe 17, with a lower near-discharge port and a higher far-discharge port, guides the airflow to cover a longer material action path.

[0043] The magnetic strip 12 and the adsorption strip 11 generate a strong magnetic seal when closed, preventing the air-permeable mesh frame 3 from loosening and opening during operation. The opening and closing mechanism facilitates cleaning and maintenance of the inside of the feeding cylinder 2.

[0044] The beneficial effects of this utility model are: dynamic drying, which combines fixed-point heat source radiation with feeding, and continuous tumbling and conveying of materials, resulting in more uniform heating, faster moisture evaporation and lower energy consumption; the drying chamber has a simple and practical structure, is easy to open, close and clean, and is easy to operate; the hot air combination continuously drives airflow during the drying process, preventing the continuous circulation of hot and humid air in the chamber, and quickly expelling it to avoid secondary moisture absorption.

Claims

1. A biomass fuel raw material drying device, comprising a supporting frame (1) and a feeding structure arranged thereon, characterized in that: The feeding structure includes a feeding cylinder (2) arranged on the support frame (1), the upper half of the feeding cylinder (2) is open and is provided with a breathable mesh frame (3), the bottom of the feeding cylinder (2) is provided with a discharge port (9) and a heating element (13), the breathable mesh frame (3) is provided with a feeding port (10), the feeding cylinder (2) is provided with a feeding auger (6) arranged therein, the end of the feeding auger (6) is connected with the output end of a motor (7), the motor (7) is connected with the feeding cylinder (2) through a first fixing seat (8), and the bottom of the feeding cylinder (2) is provided with an auxiliary drying structure.

2. The biomass fuel stock drying apparatus according to claim 1, characterized by: The breathable mesh frame (3) is connected with the feeding cylinder (2) through a plurality of hinge structures (4) on one side, and is provided with a handle structure (5) on the other side.

3. The biomass fuel stock drying apparatus according to claim 1, characterized in that: The breathable mesh frame (3) is provided with a magnetic strip (12) on the side close to the handle structure (5), and the feeding cylinder (2) is provided with an adsorption strip (11) matched with the magnetic strip (12) on the side close to the handle structure (5).

4. The biomass fuel stock drying apparatus according to claim 1, characterized in that: The auxiliary drying structure includes a heat preservation cover (14) arranged at the bottom of the feeding cylinder (2) and covering the heating element (13), one end of the heat preservation cover (14) is provided with an air inlet pipe (15), the other end of the heat preservation cover (14) is provided with an air outlet pipe (16), a plurality of groups of air supply pipes (17) and air pump structures (18) are arranged on the air outlet pipe (16) and are communicated with the inner cavity of the feeding cylinder (2), and the air pump structures (18) are connected with the feeding cylinder (2) through a second fixing seat (19).

5. The biomass fuel stock drying apparatus according to claim 4, wherein: The horizontal height of the air supply pipe (17) at the connecting end with the feeding cylinder (2) is lower than that at the connecting end with the air outlet pipe (16).

6. The biomass fuel stock drying apparatus according to claim 4, wherein: The position of the air supply pipe (17) at the connecting end with the feeding cylinder (2) is closer to the discharge port (9) than that at the connecting end with the air outlet pipe (16).

7. The biomass fuel feedstock drying apparatus according to claim 1, wherein: The feeding port (10) is a wide-mouth feeding groove.

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